Principlev1
Build custom tools when frequency is high, requirements are
Build custom tools when frequency is high, requirements are highly specific to your workflow, and available skill permits maintenance you will not resent.
Why This Is a Principle
Derives from Cognition Operates Through Dual Processing Systems (System 1 vs System 2—automation reduces effortful processing) and Behavior follows the path of least resistance due to the (least resistance principle—custom tools can reduce friction for repeated tasks). This translates transaction cost economics (from the lesson) into actionable design criteria.